Flood hazards are the most common and destructive of all
disasters and are a constant threat to life and property. Each year, flood
disasters result in tremendous losses and social disruption worldwide (Lagmay
et. al. 2017). Flood hazards are the most common and destructive of all
disasters and are a constant threat to people’s lives and their property. Each
year, flood disasters result in tremendous economic losses and social
disruption worldwide (Ntajal et. al. 2017).
The Philippines having a lot of tropical cyclones, tsunamis,
earthquakes and volcanic eruptions, is a hotbed of disasters. These natural
hazards impose loss of lives and costly damage to property. The Philippines,
situated in a region in the world where climate and geophysical tempest is
common, will inevitably suffer from
calamities especially tropical cyclones. With continued development and
population growth in hazard prone areas, it is expected that damage to infrastructure
and human losses would continue and even rise unless appropriate measures are
immediately implemented by government (Lagmay et. al. 2017).
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Geographic Information Systems (GIS) are frequently used to
produce flood hazard maps, geohazard maps and the like. They provide an
effective way of assembling information from different maps and digital
elevation models (Sanyal & Lu, 2003) such as Elevation, Slope, Soil
classification, Land use and Road networks.
The importance of the producing and providing flood hazard
maps are very crucial when it comes to disaster prevention and mitigation
especially when the Philippines goes through numerous cyclones a day. Flood
hazard mapping is very significant for appropriate land use planning especially
in flood-prone areas. Generated maps should be easy-to-read and accessible
which help in identification of areas at risk of flooding. This also helps with
the creation of mitigation practices and proper and efficient response efforts.
(Bapulu & Sinha, 2005).
Maps from this study are generated from ARCGIS. These are mainly the Flood Hazard map and the
evacuation site map. These are overlaid with Rainfall, Tributaries/rivers,
Administrative/municipal boundaries, Elevation, Slope, Soil classification,
Land use and Road networks. The flood prone areas are labeled as low
susceptibility (blue), Moderate susceptibility (yellow) and high susceptibility
(red). These are based on the raw data maps that were layered to create the
flood hazard map and the evacuation site map.
Majority of the land use of Brgy. Santo Domingo is
cultivated which used for agricultural purposes. The Rainfall data precipitation
here averages 240 mm. Road networks show
possible evacuation routes when floods arise (See
figure 345324). In figure 2134342, it is
shown that Brgy. Santo Domingo has the lowest elevation of 0 which makes it at
high risk for flooding. The slope describes the steepness or incline of Brgy.
Santo Domingo ranges from 0-3 degrees class which indicates that 0-5% of slope
is indicated in the map obtained.
In conlusion, one more evacuation site has been recommended
as the existing ones such as Kabaritan Elementary School and ksdfksdnfkdnfks are not feasible due to their
susceptibility to floods. These maps are very important and helpful for the
Barangay to be able to create and impose adaptation options such as emergency
planning, disaster prevention and preparedness, recovery such as post disaster
reconstruction and rehabilitation, vulnerability and risk reduction, provision
of evacuation shelters and planning and flood-proofing measures (Adeniran 2014).
The researchers highly recommend that to expect the annual risk of flooding by
maps generated and updating of maps to be able to adapt the adaptation options
created from the generated maps.